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GENERAL INFORMATION (Details)	Sep. 30, 2013 t
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Reliance [Member]
Vessels [Line Items]
Capacity of vessels	29,952
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Vigour [Member]
Vessels [Line Items]
Capacity of vessels	73,941
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Explorer [Member]
Vessels [Line Items]
Capacity of vessels	29,952
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Carrier [Member]
Vessels [Line Items]
Capacity of vessels	47,180
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Sugar [Member]
Vessels [Line Items]
Capacity of vessels	29,952
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Pioneer [Member]
Vessels [Line Items]
Capacity of vessels	29,952
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Progress [Member]
Vessels [Line Items]
Capacity of vessels	29,952
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Wisdom [Member]
Vessels [Line Items]
Capacity of vessels	47,180
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Success [Member]
Vessels [Line Items]
Capacity of vessels	47,186
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Beauty [Member]
Vessels [Line Items]
Capacity of vessels	73,941
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Knight [Member]
Vessels [Line Items]
Capacity of vessels	73,941
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Leader [Member]
Vessels [Line Items]
Capacity of vessels	73,941
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Marine [Member]
Vessels [Line Items]
Capacity of vessels	45,222
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Prosperity [Member]
Vessels [Line Items]
Capacity of vessels	47,180
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Muse [Member]
Vessels [Line Items]
Capacity of vessels	48,913
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Acheron [Member]
Vessels [Line Items]
Capacity of vessels	72,495
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Surprise [Member]
Vessels [Line Items]
Capacity of vessels	72,495
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Augustus [Member]
Vessels [Line Items]
Capacity of vessels	180,151
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Tiberius [Member]
Vessels [Line Items]
Capacity of vessels	175,874
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco London [Member]
Vessels [Line Items]
Capacity of vessels	177,833
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Titus [Member]
Vessels [Line Items]
Capacity of vessels	177,729
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Challenger [Member]
Vessels [Line Items]
Capacity of vessels	28,428
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Charger [Member]
Vessels [Line Items]
Capacity of vessels	28,398
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Warrior [Member]
Vessels [Line Items]
Capacity of vessels	55,435
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Predator [Member]
Vessels [Line Items]
Capacity of vessels	55,407
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Hunter [Member]
Vessels [Line Items]
Capacity of vessels	58,729
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Champion [Member]
Vessels [Line Items]
Capacity of vessels	28,445
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Constantine [Member]
Vessels [Line Items]
Capacity of vessels	180,183
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Raptor [Member]
Vessels [Line Items]
Capacity of vessels	76,499
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Cavalier [Member]
Vessels [Line Items]
Capacity of vessels	53,617
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Thunder [Member]
Vessels [Line Items]
Capacity of vessels	76,588
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Hadrian [Member]
Vessels [Line Items]
Capacity of vessels	169,694
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Commodus [Member]
Vessels [Line Items]
Capacity of vessels	169,025
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Maximus [Member]
Vessels [Line Items]
Capacity of vessels	169,025
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Claudius [Member]
Vessels [Line Items]
Capacity of vessels	169,025
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Bay [Member]
Vessels [Line Items]
Capacity of vessels	34,296
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Ocean [Member]
Vessels [Line Items]
Capacity of vessels	34,409
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Avra [Member]
Vessels [Line Items]
Capacity of vessels	34,391
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Mare [Member]
Vessels [Line Items]
Capacity of vessels	34,428
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Spirit [Member]
Vessels [Line Items]
Capacity of vessels	34,432
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Aquitaine [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Ardennes [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Auvergne [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Bourgogne [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Brittany [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Languedoc [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Loire [Member]
Vessels [Line Items]
Capacity of vessels	53,416
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Lorraine [Member]
Vessels [Line Items]
Capacity of vessels	53,416
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Normandy [Member]
Vessels [Line Items]
Capacity of vessels	53,596
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Picardy [Member]
Vessels [Line Items]
Capacity of vessels	55,257
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Provence [Member]
Vessels [Line Items]
Capacity of vessels	55,317
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Pyrenees [Member]
Vessels [Line Items]
Capacity of vessels	57,981
GS&T and wholly-owned subsidiaries excluding Baltic Trading Limited [Member] | Genco Rhone [Member]
Vessels [Line Items]
Capacity of vessels	58,018
Baltic Leopard Limited [Member] | Baltic Leopard [Member]
Vessels [Line Items]
Capacity of vessels	53,447
Baltic Panther Limited [Member] | Baltic Panther [Member]
Vessels [Line Items]
Capacity of vessels	53,351
Baltic Cougar Limited [Member] | Baltic Cougar [Member]
Vessels [Line Items]
Capacity of vessels	53,432
Baltic Jaguar Limited [Member] | Baltic Jaguar [Member]
Vessels [Line Items]
Capacity of vessels	53,474
Baltic Bear Limited [Member] | Baltic Bear [Member]
Vessels [Line Items]
Capacity of vessels	177,717
Baltic Wolf Limited [Member] | Baltic Wolf [Member]
Vessels [Line Items]
Capacity of vessels	177,752
Baltic Wind Limited [Member] | Baltic Wind [Member]
Vessels [Line Items]
Capacity of vessels	34,409
Baltic Cove Limited [Member] | Baltic Cove [Member]
Vessels [Line Items]
Capacity of vessels	34,403
Baltic Breeze Limited [Member] | Baltic Breeze [Member]
Vessels [Line Items]
Capacity of vessels	34,386
Baltic Fox Limited [Member] | Baltic Fox [Member]
Vessels [Line Items]
Capacity of vessels	31,883
Baltic Hare Limited [Member] | Baltic Hare [Member]
Vessels [Line Items]
Capacity of vessels	31,887
Baltic Lion Limited [Member] | Baltic Lion [Member]
Vessels [Line Items]
Capacity of vessels	179,185	[1]
Baltic Tiger Limited [Member] | Baltic Tiger [Member]
Vessels [Line Items]
Capacity of vessels	179,185	[1]
[1] Delivery dates for vessels being delivered in the future are estimates based on guidance received from the sellers.

X

- Definition

Represents the capacity of vessels expressed in deadweight tonnage (dwt), a measure of weight a ship is carrying or can safely carry.

+ References

No definition available.

+ Details

Name:	gnk_CapacityOfVesselsInDeadweightTonnage
Namespace Prefix:	gnk_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	gnk_VesselsLineItems
Namespace Prefix:	gnk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration